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bq24295 I2C Controlled 3A Single Cell USB Charger With Narrow VDC 4.5-5.5V Adjustable Voltage at 1.5A Synchronous Boost Operation
SLUSBC1B
September 2013 – December 2016
PRODUCTION DATA.
CONTENTS
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bq24295 I2C Controlled 3A Single Cell USB Charger With Narrow VDC 4.5-5.5V Adjustable Voltage at 1.5A Synchronous Boost Operation
1
Features
2
Applications
3
Description
4
Revision History
5
Description (Continued)
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Requirements
7.7
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Device Power Up
8.3.1.1
Power-On-Reset (POR)
8.3.1.2
Power Up from Battery without DC Source
8.3.1.2.1
BATFET Turn Off
8.3.1.2.2
Shipping Mode
8.3.1.3
Boost Mode Operation from Battery
8.3.1.3.1
Integrated Control to Switch Between USB Charge Mode and Boost Mode
8.3.1.4
Power Up from DC Source
8.3.1.4.1
REGN LDO
8.3.1.4.2
Input Source Qualification
8.3.1.4.3
Input Current Limit Detection
8.3.1.4.4
D+/D- Detection Sets Input Current Limit
8.3.1.4.5
Force Input Current Limit Detection
8.3.1.5
Converter Power-Up
8.3.1.6
Low Power HIZ State
8.3.2
Power Path Management
8.3.2.1
Narrow VDC Architecture
8.3.2.2
Dynamic Power Management
8.3.2.3
Supplement Mode
8.3.3
Battery Charging Management
8.3.3.1
Autonomous Charging Cycle
8.3.3.2
Battery Charging Profile
8.3.3.3
Thermistor Qualification
8.3.3.3.1
Cold/Hot Temperature Window
8.3.3.4
Charging Termination
8.3.3.4.1
Termination When REG02[0] = 1
8.3.3.5
Charging Safety Timer
8.3.3.5.1
Safety Timer Configuration Change
8.3.4
Status Outputs (STAT, and INT)
8.3.4.1
Charging Status Indicator (STAT)
8.3.4.2
Interrupt to Host (INT)
8.3.5
Protections
8.3.5.1
Input Current Limit on ILIM
8.3.5.2
Thermal Regulation and Thermal Shutdown
8.3.5.3
Voltage and Current Monitoring in Buck Mode
8.3.5.3.1
Input Over-Voltage (ACOV)
8.3.5.3.2
System Over-Voltage Protection (SYSOVP)
8.3.5.4
Current Monitoring in Boost Mode
8.3.5.5
Battery Protection
8.3.5.5.1
Battery Over-Voltage Protection (BATOVP)
8.3.5.5.2
Battery Short Protection
8.3.5.5.3
System Over-Current Protection
8.4
Device Functional Modes
8.4.1
Host Mode and Default Mode
8.5
Programming
8.5.1
Serial Interface
8.5.1.1
Data Validity
8.5.1.2
START and STOP Conditions
8.5.1.3
Byte Format
8.5.1.4
Acknowledge (ACK) and Not Acknowledge (NACK)
8.5.1.5
Slave Address and Data Direction Bit
8.5.1.5.1
Single Read and Write
8.5.1.5.2
Multi-Read and Multi-Write
8.6
Register Map
8.6.1
I2C Registers
8.6.1.1
Input Source Control Register REG00 [reset = 01011000, or 0x58]58 to 0x58 in heading
8.6.1.2
Power-On Configuration Register REG01 [reset = 0011101100011011 to 00111011 and 0x1B to 0x3B in heading, or 0x3B]
8.6.1.3
Charge Current Control Register REG02 [reset = 00100000, or 0x20]
8.6.1.4
Pre-Charge/Termination Current Control Register REG03 [reset = 00010001, or 0x11]
8.6.1.5
Charge Voltage Control Register REG04 [reset = 10110010, or 0xB2]
8.6.1.6
Charge Termination/Timer Control Register REG05 [reset = 10011100, or 0x9C]
8.6.1.7
Boost Voltage/Thermal Regulation Control Register REG06 [reset = 10010011, or 0x93]
8.6.1.8
Misc Operation Control Register REG07 [reset = 01001011, or 0x4B4B to 0x4B in heading ]
8.6.1.9
System Status Register REG08
8.6.1.10
New Fault Register REG09
8.6.1.11
Vender / Part / Revision Status Register REG0A
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.2.1
Inductor Selection
9.2.2.2
Input Capacitor
9.2.2.3
Output Capacitor
9.2.3
Application Performance Plots
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Documentation Support
12.1.1
Related Documentation
12.2
Receiving Notification of Documentation Updates
12.3
Community Resources
12.4
Trademarks
12.5
Electrostatic Discharge Caution
12.6
Glossary
13
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
RGE|24
MPQF124G
Thermal pad, mechanical data (Package|Pins)
RGE|24
QFND136Y
Orderable Information
slusbc1b_oa
slusbc1b_pm
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